We report the discovery of a rare isolated group of five dwarf galaxies located at z = 0.0086 (D = 36 Mpc). All member galaxies are star forming, blue, and gas rich, with gr indices ranging from 0.2 to 0.6 mag, and two of them show signs of ongoing mutual interaction. The most massive member of the group has a stellar mass that is half of the Small Magellanic Cloud stellar mass, and the median stellar mass of the group members is 7.87 × 10 7 M ☉ . The derived total dynamical mass of the group is M dyn = 6.02 × 10 10 M ☉ , whereas its total baryonic mass (stellar + H I) is 2.6 × 10 9 M ☉ , which gives us the dynamical to baryonic mass ratio of 23. Interestingly, all galaxies found in the group are aligned along a straight line in the plane of the sky. The observed spatial extent of the member galaxies is 154 kpc, and their relative lineof-sight velocity span is within 75 km s -1 . Using the spatially resolved optical spectra provided by the Dark Energy Spectroscopic Instrument early data release, we find that three group members share a common rotational direction. With these unique properties of the group and its member galaxies, we discuss the possible importance of such a system in the formation and evolution of dwarf galaxy groups and in testing the theory of large-scale structure formation.

Unified Astronomy Thesaurus concepts: Interacting galaxies (802); Dwarf galaxies (416); Galaxy groups (597)